[Mariadb] Update to 10.11 (LTS) (#5152)

* [Mariadb] Update to 10.11 (LTS)

* mysql: set default collation to general_ci

data/conf/mysql/my.cnf

@@ -1,7 +1,7 @@
 [mysqld]
 character-set-client-handshake = FALSE
 character-set-server           = utf8mb4
-collation-server               = utf8mb4_unicode_ci
+collation-server               = utf8mb4_general_ci
 #innodb_file_per_table          = TRUE
 #innodb_file_format             = barracuda
 #innodb_large_prefix            = TRUE
@@ -20,7 +20,7 @@ thread_cache_size       = 8
 query_cache_type        = 0
 query_cache_size        = 0
 max_heap_table_size     = 48M
-thread_stack            = 192K
+thread_stack            = 256K
 skip-host-cache
 skip-name-resolve
 log-warnings            = 0

docker-compose.yml

@@ -17,7 +17,7 @@ services:
             - unbound
 
     mysql-mailcow:
-      image: mariadb:10.5
+      image: mariadb:10.11
       depends_on:
         - unbound-mailcow
         - netfilter-mailcow